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3 years ago

Write in which of these processes heat is absorbed or releases heat.

Chemistry

1 answer:

neonofarm [45]3 years ago

3 0

Answer:

1. Endothermic process

4Exothemic process

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Who is the editor in chief of The Washington Post?.

Stels [109]

Steven Ginsberg named managing editor of The Washington Post, rounding out senior management team

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2 years ago

In a reaction that occurs in solution, the volume will not change. What happens to the concentration of the reactants? What happ

Stella [2.4K]

Answer:

the reaction will increase

Explanation:

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3 years ago

Why is the mesosphere colder than the troposphere

mezya [45]

The mesosphere is the coldest of the atmospheric layers. In fact it is colder than the Polar regions of the Earth cold enough to freeze water vapor into ice clouds. As you increase in altitude, temperature decreases The thermosphere is the layer to which this pattern does not apply.

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3 years ago

What is the molar mass of cholesterol if 0.00105 mol weigh 0.406 g?

Rudiy27

Answer:

387 g/mol

Explanation:

The molar mass is a ratio comparing a substance's mass and molar value. The specific ratio looks like this:

Molar Mass (g/mol) = mass (g) / moles

You can plug the given values into the ratio to find the molar mass.

Molar Mass = mass / moles

Molar Mass = 0.406 g / 0.00105 mol

Molar Mass = 387 g/mol

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2 years ago

What are the two different ions present in the compound al(no3)3?

Aleks [24]

$Al^{3+}$ and $NO_3^{-}$

Aluminum nitrate is an ionic compound, meaning that it is made up cations and anions. By convention when writing the formula for an ionic compounds the cation part shall be placed in front the anions. Thus the cation would contain aluminum and the anion shall be a polyatomic nitrate ion consisting of nitrogen and oxygen. The bracket with subscript 3 attached resembles the ratio between the two species, aluminum ions and nitrate ions. For each aluminum ion in the compound there shall be three corresponding nitrate ions.

Aluminum form ions of charge +3 whereas nitrate ions are of charge -1. Write the charge of the ion as the superscript in reverse (i.e., write $3+$ as in $Al^{3+}$ and $-$ in $NO_3^{-}$ , omitting any 1.)

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3 years ago